Seaforce 90

Jotun Seaforce 90 Overview

Jotun Seaforce 90 is a high-performance, self-polishing single component antifouling coating formulated to provide extended protection for vessels operating in global trade. Utilizing advanced ion exchange technology, this single-component acrylic paint offers up to 60 months of fouling protection on flat bottoms, sides, and boot tops. Its low leached layer and high-performance biocides make it particularly suitable for high-speed vessels exceeding 18 knots and those with high-frequency operations.

Key Product Features

• Self-Polishing Mechanism - Ensures consistent antifouling performance by gradually wearing away thus continually releasing biocides, maintaining a smooth hull surface.
• Extended Protection - Offers up to 60 months of fouling resistance, reducing maintenance frequency.
• High-Performance Biocides - Incorporates effective biocides to prevent marine organism attachment.
• Low Leached Layer - Minimises preparatino time when re-coating

 The table below compares Jotun Seaforce 90 to traditional antifouling paints.

Suitable Uses and Applications

Seaforce 90 can be applied on both steel and aluminium vessels.  Suitable applications include;

• High-Speed Vessels - Ideal for ships operating over 18 knots and with high operational frequency.
• Commercial Vessels - Designed for deep-sea vessels including cargo ships and tankers.
• Working Boats - Suitable for supply vessels and other operational craft requiring reliable antifouling protection.

Basic Application Guide

The application steps below are a high level guide.  For more comprehensive application instructions please refer to the application guide.  The required quality of surface preparation can vary depending on the area of use, expected durability and if applicable, project specification.

Step 1 - Surface Preparation

• This product can be applied on top of most of Jotun's other antifouling products assuming the surface is clean and dry and free from flaking paint.
• For existing antifouling in good condition, pressure washing at 200 bar will be sufficient.  At lower pressures, a light sand to remove any leached layers of old antifouling may be required.
• A tie-coat of Vinyguard Silvergrey 88 or Safeguard Universal ES will be required in the absence of existing antifouling or over existing antifouling in poor condition, prior to applying Seaforce 90

Step 2 - Mixing

• As a single-component product, Jotun Seaforce 90 requires thorough stirring before application.
• If applying with airless spray, a thinner such as Jotun Thinner No.7 can be used.

Step 3 - Application Methods

• Temperature - Apply when ambient and surface temperatures are between 10°C and 30°C.
• Humidity - Ensure relative humidity is below 85% to promote proper curing.
• Brush, roller or airless spray may be used.

Step 4 - Drying and Recoating

• Surface Dry - Approximately 30 minutes at 23°C.
• Minimum Recoat Interval - 7 hours at 23°C.

Step 5 - Cleanup

• Clean tools and equipment immediately after use with Jotun Thinner No. 7.

Jotun Seaforce 90 Frequently Asked Questions (FAQ’s)

The FAQ's below are for general guidance.  For specific questions, please refer to the application guides and data sheets on our product pages, or give us call and we will answer any questions that you have.

Q. What substrates can Jotun Seaforce 90 be applied to?
A. Jotun Seaforce 90 is approved by Jotun for application to steel and aluminium substrates, providing versatile antifouling protection for various vessel types

Q. Is a primer necessary before applying Jotun Seaforce 90?
A. No,  but applying a coat of Vinyguard Silvergrey 88 or Safeguard Universal ES  is recommended if the existing antifouling is in poor condition.  This  ensures optimal adhesion and long-term performance of the antifouling system.

Q. How long does Jotun Seaforce 90 take to dry?
A. At 23°C, the coating becomes surface dry in approximately 30 minutes and is ready for overcoating within 7 hours, depending on ambient conditions.

Q. Can Jotun Seaforce 90 be applied over existing antifouling paint?
A. Yes, it can be applied over compatible, well-adhered existing antifouling coatings. Proper surface preparation, such as high-pressure washing and mechanical cleaning, is required to remove any loose or degraded coatings.

Q. What application methods are suitable for Jotun Seaforce 90?
A. Brush, roller or airless spray may be used.

Q. How should the surface be prepared before application?
A. Surfaces should be clean, dry, and free from contaminants. Any marine growth, salts, grease, or loose coatings should be removed using high-pressure fresh water washing to ensure maximum adhesion and performance.

Q. Is thinning required for Jotun Seaforce 90?
A. Thinning is not typically necessary, but in hot or windy conditions Jotun Thinner No. 7 can be used in small amounts, following local VOC regulations. Over-thinning will extend the coverage rate, reducing the film thickness and therefore the effective active life of the coating

Q. What is the coverage rate of Jotun Seaforce 90?
A. The natural spreading rate when using a brush or roller is approximately 8 - 10m² per litre.  Typically in UK waters we recommend one coat per year of service required up to  coats, with an extra coat at the water line, leading and trailing edges

Q. Can Jotun Seaforce 90 be used for vessels operating at high speeds?
A. Yes, it is specifically designed for high-speed vessels operating at speeds above 18 knots. Its self-polishing technology helps maintain a smooth hull surface, reducing drag and improving fuel efficiency.

Q. How should tools and equipment be cleaned after use?
A. Tools and equipment should be cleaned immediately after use with Jotun Thinner No. 7 to prevent the paint from hardening. Proper cleaning helps maintain the performance and longevity of spray equipment.

Q. How long should I wait before launching my vessel after applying Jotun Seaforce 90?
A. The minimum drying time before immersion varies based on temperature and humidity. Typically, vessels should wait at least 12–48 hours before launching. Consult the technical data sheet for precise guidelines.

Q. How many coats of Jotun Seaforce 90 should be applied?
A. The number of coats depends on the desired service life and fouling conditions. Most vessels require two to three coats for optimal performance, but heavily exposed hulls may require additional layers.

Q. Is Jotun Seaforce 90 environmentally friendly?
A. Jotun Seaforce 90 contains biocides. It meets international environmental regulations for antifouling paints.

Q. Can Jotun Seaforce 90 be used in both warm and cold water environments?
A. Yes, Jotun Seaforce 90 is suitable for global trading conditions and provides reliable fouling protection in both warm and cold waters. Its controlled biocide release ensures consistent performance across different climates.

 Q. What is the expected lifespan of Jotun Seaforce 90?
A. Jotun Seaforce 90 provides up to 60 months of antifouling protection, depending on film thickness applied, water temperature, operating conditions, vessel speed  and voyage factor (the percentage of the time the vessel is underway).